// var config = require("./config.json")
// var system = require("./@system.os.js")

// console.log(config)

var headers = {
    "Accept": "application/json",
    "Content-Type": "application/json;charset:utf-8"
}

var keys = Object.keys(headers);
console.log("keys ========> \r\n")
console.log(keys)
console.log("\r\n")

var headersStr = "";
var key = null, value = null;
for(var i = 0; i < keys.length; i++) {
    key = keys[i];
    value = headers[key];

    console.log("key ======> " + key + "\r\n");
    console.log("value =======> " + value + "\r\n");
    var kv = key + ":" + value + "\r\n";
    console.log("kv ======> " + kv + "\r\n");
}

console.log("result ========> " + headersStr + "\r\n");